1. Business seats are all ______________.(前排的座位）2. 36 K is a _______________ seat.3. 45H is an _____________ seat in the middle.4. 46A is________________ to the exit.5. Seats in 57 and 58 are _______________ seats.https://www.csair.com/en/tourguide/flight_service/cabin_layout/kongke/18idkvmedtkic.shtml